At a 5 s meter a register frozen at rest on B trips the stale gate before the 12-cycle evidence; its refusal must be centred on B's idle reading, or the site stops and re-trips instead of refusing B. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_019DBUfvndgHwaV339Fvd2gr